CAJ | 학술논문

倒虹吸结构广泛应用于我国农田水利建设、城市供水、大型调水工程中，很大一部分倒虹吸结构处于高烈度地震区，不可避免遇到抗震问题。考虑土与倒虹吸结构的相互作用，建立三维有限元模型进行静力分析，并在此基础上进行倒虹吸结构动力时程分析，研究倒虹吸结构在动力作用下的工作性态。通过比较加速度、位移及应力3方面的响应情况，发现地震作用下，加速度沿倒虹吸截面高度变化不大，y 向位移相对 x 及 z 向较大，各向应力的增幅较小，7级地震作用下倒虹吸结构是安全的。
도홍흡결구엄범응용우아국농전수리건설、성시공수、대형조수공정중，흔대일부분도홍흡결구처우고열도지진구，불가피면우도항진문제。고필토여도홍흡결구적상호작용，건립삼유유한원모형진행정력분석，병재차기출상진행도홍흡결구동력시정분석，연구도홍흡결구재동력작용하적공작성태。통과비교가속도、위이급응력3방면적향응정황，발현지진작용하，가속도연도홍흡절면고도변화불대，y 향위이상대 x 급 z 향교대，각향응력적증폭교소，7급지진작용하도홍흡결구시안전적。
Inverted siphon structure is widely used in China’s farmland water conservancy construction,city water supply,and large water diversion project.But seismic problems are inevitably encountered because a large part of inverted siphon structures are located in regions of high seismic intensity.A three-dimensional finite element model in consideration of the interaction between soil and inverted siphon structure is established to conduct static analy-sis.On this basis,the working performance of inverted siphon structure under dynamic action is researched through time-history analysis.By comparing the responses of acceleration,displacement and stress,we concluded that there is little change in the acceleration along the sectional height of inverted siphon,and the displacement in direction y is larger than that in direction x and z,and the increment of stress is not large in all directions.The inverted siphon structure is safe under earthquake of magnitude 7.